Other drives are equipped with open loop vector with encoder feedback options or V/Hz control. Baldor controls can also have sensorless vector or V/Hz controls with PID control, and quick start assistance.

Baldor Brands: Baldor-Reliance and Baldor-Dodge

Baldor drives and controls are used in a variety of industries, including:

Control Concepts has over 30 years of experience in Baldor drive repair, service, and support.

Common Drive Failures

Software or programming problems

Non-functional cooling fans

Loose connections

Drive keeps blowing fuses or tripping breakers

Drive doesn’t run motor

Circuit board failure

Circuit board failure is the least common reason for drive failures. The most common fault that shuts down a drive is an over-current fault, of which there are 20-30 causes. We start with the dynamics of the motor and move on from there.

The Control Concepts Repair Process

We check the motor drive and terminals for substandard connections which can be caused by anything from heat cycles and mechanical vibration to reusing or over-tightening torque screws.

We conduct diode and IGBT tests on the input/output power sections before applying power to the drive unit. This is to protect against further damage from a short.

We power up the unit and perform amp readings and output frequency tests, slowly increasing the voltage until the rated input voltage of the drive is reached.

If everything functions properly, we use the drive to run a motor through basic jog functions after backing up existing programs. If the motor does not run, we check the output voltages and current ratings going to the motor to check drive function for motor rotation.